@book { DerpostromantischeBrief,
    title = "Der postromantische Brief",
    subtitle = "Zum Briefwechsel von André Gide und Paul Valéry (1890-1942)",
    author = "Eva {Erdmann}",
    year = "2007",
    publisher = "Meidenbauer",
    address = ", Germany",
    url = "https://www.peterlang.com/document/1104106"
}